class Animal:
    name = 'animal'
    def shout(self):
        print('animal shout')

animal = Animal()
print(animal.name)
animal.shout()


class Dog:
    name = 'dog'

    def __init__(self):
        self.age = 10

    def eat(self):
        print('dog eat')

dog =Dog()
print(dog.name)
dog.eat()


dog1 = Dog()
print(dog1.name)
print(Dog.name)

dog1.name = 'dddddd1'
print(dog1.name)
print(Dog.name)

Dog.name = '____dddd1'
print(dog1.name)
print(Dog.name)
print('----------')
dog2 = Dog()
print(dog2.name)  ##类属性只能通过类来改
print(dog2.age)




